Charles H. Spurgeon on Psalms 119:26

I have declared my ways. Open confession is good for the soul. Nothing brings more ease and more life to a man than a frank acknowledgment of the evil which has caused the sorrow and the lethargy. Such a declaration proves that the man knows his own condition, and is no longer blinded by pride. Our confessions are not meant to make God know our sins, but to make us know them.

And thou heardest me. His confession had been accepted; it was not lost labour; God had drawn near to him in it. We ought never to go from a duty till we have been accepted in it. Pardon follows upon penitent confession, and David felt that he had obtained it. It is God's way to forgive our sinful way when we from our hearts confess the wrong.

Teach me thy statutes. Being truly sorry for his fault, and having obtained full forgiveness, he is anxious to avoid offending again, and hence he begs to be taught obedience. He was not willing to sin through ignorance, he wished to know all the mind of God by being taught it by the best of teachers. He pined after holiness. Justified men always long to be sanctified. When God forgives our sins we are all the more fearful of sinning, again. Mercy, which pardons transgression, sets us longing for grace which prevents transgression. We may boldly ask for more when God has given us much; he who has washed out the past stain will not refuse that which will preserve us from present and future defilement. This cry for teaching is frequent in the Psalm; in Psalms 119:12 it followed a sight of God, here it follows from a sight of self. Every experience should lead us thus to plead with God.